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Birthday Members Profile

Birthday Members Profile

Birthday (벌스데이), formerly known as Crescendo (크레센도), was a pre-debut South Korean girl group under NS Entertainment. Unfortunately, it seems the group silently disbanded in 2021.

Birthday Fandom Name:
Birthday Official Colors:

Birthday Official Accounts:
Instagram: birthday__official
TikTok: @birthday_official

Members Profiles:

Stage Name: Hyeyeon (혜연)
Birth Name: Ko Hyeyeon (고혜연)
Position: Leader
Birthday: March 18, 1994
Zodiac Sign: Pisces
Blood Type:
Nationality: Korean
Instagram: kkohyeyeon

Hyeyeon Facts:
– Original member.
– She is Zizi’s older sister.
– She’s friends with former OH MY GIRL member JinE.
– She loves designer accessories and clothes.


Stage Name: Xiyoung (시영) [formerly Juuny (쥬니)]
Birth Name: Park Jooyoon (박주윤)
Birthday: January 7, 1997
Zodiac Sign: Capricorn
Height: 163 cm (5’4″)
Blood Type:
Nationality: Korean
Instagram: xiyoung.xom

Juuny Facts:
– She released a self-produced, self-choreographed solo track called Universe in 2019.
– She is close friends with EXY of WJSN and all members of Lovelyz.
– She lived in Los Angeles and speaks fluent English.
– She has worked with 1MILLION Dance Studio and the Playground LA.
– She enjoys singing, dancing, composing, and writing lyrics.
– She joined the group around late 2020 to replace Dayul.
– She was born the same day as Dreamcatcher‘s Yoohyeon, fromis_9‘s Saerom and RedSquare‘s Green among others.


Stage Name: Chaeeun (채은)
Birth Name: Lee Chaeeun (이채은)
Position: Lead Vocalist
Birthday: March 25, 1997
Zodiac Sign: Aries
Height: 165 cm (5’5″)
Weight: 43 kg (94 lbs)
Blood Type: A
Nationality: Korean
Instagram: 1m_3.25

Chaeeun Facts:
– Original member.
– She was a member of YJIG under the stage name Chaeni. They debuted in late 2018 and disbanded in May 2019.
– She likes taking pictures and playing with her cats.
– Her favorite music genres are R&B (especially calm songs) and piano ballads.
– She’s friends with ICU‘s Abin and Naye (who was a fellow member of hers in YJIG), as well as Hey Girls‘ former member Siyeon.


Stage Name: Zizi (지지) [formerly Mohae (모해)]
Birth Name: Ko Jisu (고지수)
Position: Maknae
Birthday: February 26, 1998
Zodiac Sign: Pisces
Blood Type:
Nationality: Korean
Instagram: gsu0226

Mohae Facts:
– Original member.
– She is Hyeyeon’s younger sister.
– She’s a fan of Taeyeon.

Former Member:

Stage Name: Dayul (다율)
Birth Name: Kang Dabin (강다빈)
Position: Main Vocalist
Birthday: May 9, 1997
Zodiac Sign: Taurus
Height: 170 cm (5’7″)
Weight: 45 kg (99 lbs)
Blood Type: A
Nationality: Korean
Twitter: dabin59 (inactive)
Instagram: _bi_nio5o9
YouTube: 다율TV DAYUL TV

Dayul Facts:
– She was a member of Baby Boo under her birth name Dabin from 2016 to 2018.
– She was a contestant of The Unit.
– She originally auditioned over 100 times prior to actually debuting with Baby Boo.
– She was named Miss Korea and Miss Korea Seoul Entertainer in 2019.
– She’s close with former fellow Baby Boo members DaonJelly and Hajin.
– She left the group between mid and late 2020.

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profile made by midgehitsthrice

(Special thanks to Crescendo Intl on Carrd, jelly, irem, Hothae, Olever, john for the info)

Who is your Birthday bias?

Who is your Birthday bias? Do you know any more facts about them? Feel free to comment down below.

About the author


Hello everybody! You can call me Midge here. I've been an author on KProfiles since November 2019.

I like finding nugu (=super underrated) K-Pop artists. I think I've found some of the nuguest artists I could come across.

Unfortunately, I tend to be extremely forgetful and a master procrastinator, so I apologize for that.

I have a long-*ss bias list, so I don't think it can fit here.

Be nice and enjoy!